I am trying to and a card to wallet but always when I press the icon to add a card, it send me to a page of technique support of apple

Add and manage passes in Wallet on iPhone - Apple Support, please note that passes cannot be directly added within wallet, except for QR code enabled passes. For everything else, its done either through the associated app, an email, airdrop or a link in a website.

Where are you located? I cannot read the warning it is showing you.

What happens when you select the "more information" option?